UE5.3 Need help to Sprint Replicated [Blueprint]

Hello, I am a beginner on Unreal Engine and I would like to be able to replicate the sprint, like other mechanics later. Except that for the moment, when I want to sprint in co-op, the character I control cannot run and is forced to advance at a certain speed. I tried several things I saw on YouTube in Blueprint but it never worked for the sprint.
I give you my blueprint with the two functions StartSprinting and StopSprinting, if someone could help me please